Notes from the field

Writing

Long-form thinking on cyber defence, detection, and resilience — from Slackware-era honeypots through to AI-driven SOC analytics.

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Sendmail relay configuration without losing your mind

22 February 1999

Sendmail's reputation for opacity is earned. The relay configuration is, in practice, the part that matters most for security. Here is how I have learned to read it without going mad.

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